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Thepotemich [5.8K]
3 years ago
5

If a blood vessel has valves, it probably is a

Biology
1 answer:
Len [333]3 years ago
3 0
If it has valves then it is a vein.
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A sequence of DNA has 120 nucleotides (it is not a complete sequence).
sveta [45]

Answer:40

Explanation: a codon is three nucleotides. Provided that the sequence does not include a STOP codon, the polypeptide would have 40 amino acids

6 0
3 years ago
One way to determine the density of animals in an area is to use the mark-recapture technique. A number of individuals from a po
NNADVOKAT [17]

Answer:

N = 187.55

Explanation:

Here you just need to replace the terms and clear the equation.

You already know that,

  • First capture: 25 prairie dogs.
  • First marked animals: 25 (the whole first capture)

You let these animals leave and then you made another capture.

  • Second capture: 135 prairie dogs
  • Already Marked animals: 18 (these 18 dogs were caught in the first capture and marked before releasing them)  

To know the size of the prairie dogs population you just need to use the following equation and clear N, which is the value that you are looking for.  

Number of individual marked in first catch/Total population size, N = Number of individual marked in 2nd catch / Total number of 2nd catch

  • Number of individual marked in first catch = 25 dogs
  • Total population size, N = this is what we want to know
  • Number of individual marked in 2nd catch = 18 dogs
  • Total number of 2nd catch = 135 dogs

So now, we need to replace terms

25 / N = 18 / 135

25 / N = 0.1333

N = 25 / 0.1333

N = 187.55

4 0
3 years ago
What are the the Plate made of (the layer of the Earth?) and what do they do?
DaniilM [7]

Answer: The earth is made up of three different layers: the crust, the mantle and the core. This is the outside layer of the earth and is made of solid rock, mostly basalt and granite. There are two types of crust; oceanic and continental. Oceanic crust is denser and thinner and mainly com​posed of basalt.

Explanation:

6 0
3 years ago
If a sound is softer or a light is dimmer, what does this mean about the amplitude of the wave?
sleet_krkn [62]

Answer:

it britens up off the water My Dog Told Me

4 0
3 years ago
Which of these groups contains a single -celled organisms?
brilliants [131]

Answer:

   Escherichia coli.

   Diatoms.

   Protozoa.

   Protista.

   Streptococcus.

   Pneumococci.

   Dinoflagellates.

Explanation:

3 0
3 years ago
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